*{
    padding: 0;
}
body{
    background: deepskyblue;
    .mask{
        position: fixed;
        display: block;
        top: 0;
        left: 0;
        background: rgba(0,0,0,0.8);
        width: 100%;
        height: 100%;
        transform: translateY(0);
        transition: all .5s; 
        z-index: 9999;
        text-align: center;
        span{
            display: block;
            margin-top: 30px;
            font-size: 36px;
            color: red;
        }
    }
    button{
        position: fixed;
        top: 30%;
        left: 50%;
        transform: translateX(-50%);
        margin-top: 30px;
        width: 200px;
        height: 50px;
        font-size: 36px;
        background: skyblue;
        border: none;
        cursor: pointer;
        border-radius: 8px;
        outline: none;
    }
}
.time{
    width: 200px;
    height: 50px;
    line-height: 50px;
    margin: 20px auto;
    text-align: center;
    border-radius: 8px;
    background: whitesmoke;
}
.baba{
    margin: auto;
    display: block;
    width: 900px;
    height: 900px;
    border: 2px solid red;
    border-radius: 10px;
    .lis{
        display: inline-block;
        white-space:pre-wrap;
        overflow: hidden;
        position: relative;
        box-shadow: 5px 5px rgba(0,0,0,0.5);
        margin: 5px 7px;
        width: 209px;
        height: 209px;
        border-radius: 5px;
        border: 1px solid red;
        cursor: pointer;
        .pic{
            width: 100%;
            height: 100%;
            display: block;
        }
        .bg{
            position: absolute;
            display: block;
            width: 100%;
            height: 100%;
        }
    }
}